The answer would be 30 because, because there are 27-22 in extra parentheses we do that first which would be 5 then 100/5=20 because thats in the next set of brackets then -3*5 according to order of operations so now we have 20-15=5 then 5+25 because thats all thats left which is are end answer of 30=) Enjoy!=)
